Radeon HD 7990 vs Radeon R9 295X2

Intro

Compare all of that to the Radeon R9 295X2, which uses a 28 nm design. AMD has clocked the core frequency at 1018 MHz. The GDDR5 memory runs at a speed of 1250 MHz on this model. It features 2816 SPUs as well as 176 Texture Address Units and 64 ROPs.

Display Graphs

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

Radeon R9 295X2		21205 points
Radeon HD 7990		15520 points
	Difference: 5685 (37%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7990		375 Watts
Radeon R9 295X2		500 Watts
	Difference: 125 Watts (33%)

Memory Bandwidth

In theory, the Radeon R9 295X2 is 11% faster than the Radeon HD 7990 in general, because of its higher bandwidth. (explain)

Radeon R9 295X2		640000 MB/sec
Radeon HD 7990		576000 MB/sec
	Difference: 64000 (11%)

Texel Rate

The Radeon R9 295X2 will be quite a bit (more or less 47%) better at texture filtering than the Radeon HD 7990. (explain)

Radeon R9 295X2		358336 Mtexels/sec
Radeon HD 7990		243200 Mtexels/sec
	Difference: 115136 (47%)

Pixel Rate

The Radeon R9 295X2 is much (approximately 114%) faster with regards to AA than the Radeon HD 7990, and will be capable of handling higher resolutions more effectively. (explain)

Radeon R9 295X2		130304 Mpixels/sec
Radeon HD 7990		60800 Mpixels/sec
	Difference: 69504 (114%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Memory bandwidth is the maximum amount of data (counted in MB per second) that can be transported over the external memory interface in one second. It's calculated by multiplying the bus width by its memory clock speed. If the card has DDR type memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied in one second. This number is calculated by multiplying the total number of texture units by the core speed of the chip. The higher this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly record to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.